The PCA9555DB is an advanced product from Texas Instruments (TI), a renowned global semiconductor design and manufacturing company.

• Description: 24-pin, low voltage 16-bit I/O expander with I2C and SMBus interface.
• Interface: I2C interface serial clock (SCL) and serial data (SDA).
• Interrupt Output: Configurable to activate when any input state differs.
• Voltage Range: 2.3V-5.5V.
• Standby Current: Low.
• Reset: Internal power-on reset, hardware reset pin available.
• I/O Port Expansion: 16-bit parallel input/output.
• Polarity Inversion: Allows the polarity of the I/O to be inverted.
• Reset Input: Active LOW reset input.
• Address Pointer: Automatically increments for sequential reads/writes.
• Packages: TSSOP and HVQFN.